Wiktionary
a. (en-comparative of: unhealthy)
WordNet
adj. not in or exhibiting good health in body or mind; "unhealthy ulcers" [ant: healthy]
detrimental to health [syn: insalubrious, unhealthful]
not conducive to good health; "an unhealthy diet of fast foods"; "an unhealthy climate"
[also: unhealthiest, unhealthier]
See unhealthy
Usage examples of "unhealthier".
To pay for all this he'd set up illegal fleshlabs on the far side of the world, where his mechanics did surgery on those too notorious to venture into the Tank Farms, created monsters to order for use as bodyguards or victims, restructured contract workers bound for worlds where their current shapes would make them inefficient (their consent or lack thereof being ignored as beside the point), ran cloning services to cater to the unhealthier appetites of assorted power brokers, anyone who needed a certain amount of privacy about his or her habits.
Though he was always the protagonist of his stories, I realized that some of them must have been secondhand, otherwise he would have been a much older, much unhealthier man.